NEW YORK, May 8 (Reuters) - The dollar extended its earlier gains versus a basket of currencies to a fresh 2018 high on Tuesday as pessimism about the United States remaining in the Iran nuclear deal spurred safe-haven demand for the greenback.
At 9:47 a.m. (1347 GMT), the index that tracks the dollar against the euro, yen, sterling and three other currencies .DXY was last up 0.55 percent at 93.259.
